Threshing-machine.



.R. W. GOTSHALL.

TERESHING MACHINE.

APPLIOATION PILE@ 00T.. 29, 190e.

Patented Oct. 26, 1909.

R. W. GOTSHALL.'

THEESHING MACHINE.

APPLIOATION'IILED 00T. 29, 190B.

938,139. Patented ot.26,19o9.

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R. W. GOTSHALL. THRBSHING MACHINE. APPLICATION FILED 00T. 29, 1906.

Patented 0G13. 26, 1909.y

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Y machine. thereof on line 2-2 Fig. 1. Fig. 3 is a frag- ROBERT W. G OTSHALL, OF MARION,

OHIO.

. THRESHING-MAGHINE.

Application ledctober 29, 1906.

To all whom it may concermf Be it known that I, ROBERT W. Go'rsi-IALL, a citizen of the Unitedy States, residingA at Marion, in the county of Marion and State of Ohio, have invented a certain new and useful Improvement in rlhreshingMaChiiies,

of which the following is a specification.

My invention relates to threshing inachines and consists'in an improvement in thev general type of machine shown in my prior application, filed August 14, 1906, Serial No. 330,531.

More specifically the Apresent improvement resides in the placing of a cage adjacent to the beater arms or rotary fork shown in the aforesaid application and in providing means for agitating said cage.

vInasmuch as thevmachinehere shown in general is substantially identical with the machine shown in said prior applicatiomit will be unnecessary to enter into'a detailed description of the same except in relation to the parts which more particularly coperate with the aforesaid cage. i l

The principal object of this invention is toprovide means for retaining the straw for a considerable period of time in proximity to the rotary fork.

It is also an object to provide means for agitating the said retaining means.

Referring to the accompanying drawings which form a part of this specification: Figure 1 is a central vertical section of the Fig. 2 is a transverse section f mentary detail showing a convenient method of mounting the cage bars. Fig. 4. is a sectional elevation of the machine taken on line 4 4 Fig.. 1.' Fig. 5 is an elevation taken on line 5-5 Fig. 1 showing mechan-' ism for rocking the cage or grating. Fig. 6 is a side view of the Vpart shown in Fig. 5. Fig. 7 is a side view of a mechanism corresponding to the mechanism shown in Figs. 5 and 6 but designed to agitate the cage or grating in a direction. parallel to the length of the machine instead ofV transversely thereto. Fig. 8 is a sectional view taken on line 8-8 Fig. 7.

Similar numerals refer to similar parts throughout the several views.

The'casing 1 of the machine consists preferably ofmetal and contains the revolving screen 2. Said screen is supported and rotated within the casing by means of the rollers 3 or other suitable mechanism and Specification of Letters Patent.

the rotary fork and shaft 8 revolves at a stock from thefreceiving Patented 26, 1909.

serial No. 341,124..

is adapted to receive partially threshed stock from a primary mechanism, such for example as the one lillustrated in Fig. 1 consisting of the threshing cylinder 4 which discharges onto the shoe 5. Thev screen is provided on the inside with flights 6 whereby the grain is agitated and elevated toward consisting of beater arms 7 secured to the fork shaft 8. As explained in my aforesaid previous application, these fork or beater arms are cal so that they tend to advance the stock through thecylinder and discharge it onto the eye of. the discharging fan 9. Thus when the fork arms are taken as a whole they practically constitute functions; first, to beat the stock and separate the kernels of grain which may be resent5rsecond, to thin or spread the body vof the stock'so that it may be more thoroughly treated; third, they tend to move the stock from the receiving to the discharging end of the screen. By preference the dis- -vcharging fan is mounted upon the same shaft with'the forkY arms and in order to obtain the best results said shaft is placed eccentrically within 4the screen so that the fork arms may somewhat approach the flights 6 in the screen..

The rotary fork consisting of the 'arms 7 high rate of speed and in order to hold the stock in proximity to the fork long enough to get the full effect thereof I have provided a cage'or grating consisting, in its best forni', of a set of caffe bars 10 supported from the rod A11. The bars 10 are helical in form and mounted in such position as to vbe yconcentric Vwith shaft .8.- The purpose in making the cage bars helical is to cau'sethein to coperate with the. helical fork arms 7 to move the y to the discharging end of the screen.. In the preferred construction said. cage bars are `of steel and therefore slightly flexible and are secured at their upper end only. The purpose of this is. two fold; first, there is nothing at the lower end of the bars to prevent Vthe stock from readily slipping ofof them; and second, there is obviated the danger of the duced into the machine too rapidly the cage bars will yield and let themass pass out. The cage bars do not entirely surround the rotary fork, in the best design being about one halfl the circumference when viewed an auger and perform three bars becoming choked. If 'thestock is intro-Y approximately helirecede from the rotary fork.

from the end as in Fig. 2, and the central portion of each bar being about on a level with the fork shaft 8 and lying toward the center of the screen. The manner of attaching the cage bars to rod 11 is non essential but a suitable construction is shown in Fig. 3 in which the rod 11 is apertured to receive the upper end of the bars, and said bars are threaded at their upper end for receiving nuts 12, 12 whereby the bars 'are held in lace. p In operation, the drum is rotated in such direction that the flights 6 will be moving upward when closest to the fork arms 17 and -said fork arms will be moving down when closest to said flights. The movements of the parts when proximate are therefore inv opposite directions which produces both a threshing and a thinning or spreading action upon the stock. As a result of the presence of the cage or grating, the stock is prevented from being immediately thrown from the fork arms and is returned to them again and again, thereby producing a very thorough and complete separation of the grain from the straw and at the same time moving the straw along through the cylinder and finally delivering it to the eye of the discharging fan 9 which removes the straw from the machine.

Under certain circumstances it becomes necessary in order to deliver and remove the straw from the cage or grating to agitate the latter, and this agitation may be either longitudinal or transverse. The preferred manner of agitating the cage or grating is to give it a slow vibratory movement about bar S as a center so as to slowly approach and Mechanism for obtaining this swinging' vibration is illustrated'in general in Fig. 1 and in detail in Figs. 5 and 6 of the drawings. In this latter form of agitator the shaft 8 is extended beyond the main portion of the casing 1 and has attached thereto at a point outside of said casing a lever 13 which is pivotally attached at its free extremity to a pitman or eccentric rod 14. This rod works over an eccentric 15 upon a jack shaft 16 mounted in a stationary bracket 17 indicated in dotted lines Fig. 1. Upon said jack shaft is secured a spur gear 18 which eng'ages a pinion 19 rigidly secured to shaft 8. Gear 18 is of larger diameter than pinion 19 and therefore the eccentric 15 will rotate considerably slower than will shaft 8. This is desirable in order to produce a comparatively sl'ow vibration of the cage bars 10 notwithstandino" the fact shaft 8 rotates at a high rate 'of speed. Any other form of reduction gear however may be substituted. y

When the machine is in operation and shaft 8 is rotating, pinion 19 will drive gear 18 and eccentric 15 and thus cause a comparatively slow vibration or swinging movearm 13. This will produce a corresponding vibration of the bars 10 toward and from the rotary fork. As a result of this movement of the cage or grating the straw will readily drop therefrom when the same is raised to the position shown in dotted lines, Figs. 2 and 5.

Longitudinal vibration may be employed to shake the straw and stock from the cage or grating. Mechanism of this kind is illustrated in detail in Figs. 7 and 8.V In this form shaft 11 is extended as before rbut is pivotally connected at its extremity to a shaking' arm or lever 20. Said lever 2() is pivoted at the point 21 to some stationary part of the machine and at the other extremity hasa roller 22 which travels in a cam groove 23 in cam 211 located upon the aforesaid jack shaft 16. As a result of this last described vconstruction when the shaft 8 is rotated it will rotate cam 24 and produce a swinging movement of lever 20. The parts are so arranged that this swinging movement is in a direction parallel with bar 11 Vand hence a shaking movement is imparted to the cage or grating. This movement, which is in the direction of the length` of shaft 8, tends to shake the straw and stock from the cage and thereby `prevents the latter from becoming clogged. .Y

Having thus described my invention, what ment of lever I claim as new and `desire to secure by Letters Patent, is:

1. In a threshing-machine the combination with a rotaryl screen, of a rotary fork therein, a swinging fork partially surrounding said rotary fork, and means for supporting said rotary and swinging forks withinsaid screen, substantially as described. `f

2. In a threshing machine, the combination of a rotary screen, a rotary fork therein, and bars adjacent to said fork,.said bars being approximately helical, :conforming approximately to the surface of an imaginary ylinder arranged parallel to the axis of said 3. In a threshingY machine the combination of a rotary screen, a` rotary fork therein and yieldable bars located at the side 'of and approximately concentric with said fork and adapted to dischargethe stock at a point beneath said fork.

4. In a threshing machine the Acombination of a rotary screen, a rotary fork therein and bars partially surrounding said fork, said bars being fastened at their upper extremity and free at their lower extremity.

5. A threshing machine having-a rotary screen with flights therein for elevating the stock at one side of the machine; a rotary fork within said screen and adjacent to the rising side thereof, and a swinging fork at the side of the rotary forkopposite to the nearest portion of the screen, said swingingL fork partially inclosing the rotary fork.

6. A threshing machine having a rotary screen with flights therein for elevating the stock at one side of the machine; a rotary fork within said screen and adjacent tothe rising side thereof; bars at the side of the fork opposite to the screen, said bars having a compound curve and extending partially around andv along said forks; and an oscillating rod running parallel to the axis of the screen above said fork for supporting said bars.

7. A threshing machine having a rotary screen, a rotary fork arranged therein with its axis parallel to the axis of the screen, curved bars near and partially inclosing said fork, and means for causing said bars to approach and recede from said fork, substantially as described. 4

8. In a threshing machine the combination of a rotary screen, a rotating shaft therein, a set of arms on said shaft, curved bars adjacent to and partially inclosing said shaft and arms, and means for agitating said bars for preventing the clogging thereof with straw.

9. In a threshing machine the combination of a rotary screen, a rotating shaft therein, a set of arms on said shaft, a swinging fork adjacent to said shaft and arms and partially inclosing the same, and means connected to said rotating shaft for swinging said fork.

10. In a threshing machine the combination of a rotary screen, a casing surrounding the same, a rotary shaft running lengthwiseA of said screen, arms on said shaft, a rod running parallel to said shaft and adapted to oscillate about its own axis, bars on said rod forming a cage or grating in proximity to said shaft for temporarily holding the stock, and means for oscillating said rod to thereby cause said cage bars to approach and recede from said shaft.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

' ROBERT W. GOTSHALL.

Witnesses:

R. L. Simoon, H. THoMrsoN. 

